Illinois Law dean and professor Vikram David Amar explains why the US Supreme Court was right to leave undisturbed the recent congressional redistricting ruling by the Pennsylvania Supreme Court. Amar describes the important role (and limitations) of state courts and state legislative bodies in our federal system.

Cornell University law professor Michael C. Dorf comments on the recent announcement by Attorney General Sessions that the Trump Department of Justice was rescinding an Obama administration policy toward state-legal marijuana. Dorf argues that the policy shift breaks promises by then-candidate Trump and then-Senator Sessions, but that objections to the new policy on federalism grounds are largely misguided.

Cornell University law professor Michael C. Dorf considers whether the new tax law, which disproportionally affects “blue” states as compared to “red” states due to changes to the deductions for state and local taxes (SALT), is unconstitutional. Dorf explains some of the possible arguments against the law but ultimately concludes that due to difficulties of proof, courts probably won’t end up ruling that the SALT deductibility cap violates the First Amendment or a core principle of federalism.

Illinois Law dean and professor Vikram David Amar explains the federalism doctrines implicated by Attorney General Sessions’ attempt to deny funding to sanctuary jurisdictions. Amar points to lower court decisions that reflect a misunderstanding of the doctrines and calls upon federal courts and their law clerks to better understand and apply not just the nuanced technical details of various specific doctrines, but the overall federalism big picture as well.

Illinois Law dean and professor Vikram David Amar comments on recent actions by state and local governments to oppose federal policies, such as the immigration and the wall along the U.S.–Mexico border. Amar argues that these attempts likely run contrary to the Supremacy Clause of the U.S. Constitution by attempting to interfere with the execution of federal policy.

Illinois Law dean and professor Vikram David Amar discusses several legislative proposals in various states that purport to give state legislatures power to interpret and implement the federal Constitution notwithstanding judicial rulings interpreting the same. Amar explains some of the key differences between the different proposals and why some are likely to pass constitutional muster while others are not.

Cornell University law professor Michael Dorf argues that in some contexts, consideration of states’ rights is relevant to the interpretation of federal statutes, but in other contexts—including the federal lawsuit over a transgender boy’s access to a boys’ restroom at school—principles of federalism are outweighed by other considerations. Dorf provides three examples of instances where federalism should play a role in the interpretation of federal statutes, and he explains why the transgender bathroom case differs from those instances.